I checked the trailer lights with my lights turned on and then with the hazard light and then individually with the signals, which all worked, but nothing with the brakes. Not assuming anything, if you have the light out anyway, check the ground. Hazards, Brakes, Running Lights, Turn Signals... Everything works on the trailer except the left side brake light. right turn signal,and right brake light not working on my trailer. Cause? We did check fuses. Trailer brake and blinker on left side pin do not work either. The vehicle lights work perfectly fine. I checked the bulb on the camper and it is fine. This is not the case in every car, so check a wiring diagram to see if the wires go through the turn signal switch. Its not the trailer, I have tried multiple. I recently used a uhaul tow dolly and we could not get the brake or turn signals to work on dolly. Turn signals and brake lights don't work. Running lights work, turn signals work, flashers work. Answer: Check both sides of the fuse and make sure power is going through. Fuses under dash check good. Dash reeds (trailer connected) when trailer is plugged up. and i replaced the trailer lights a few times too. I Had No Idea There Were Fuse Under There. Running lights work OK. Ford, F250, 2011. Wiring harness looks excellent everywhere. Tail lights don’t light at all when I turn on the headlights. checked fuse in right kick panel ok, swapped relays under hood, relay good. I know there are 2 locations for … The left turn signal and brake light are on the same wire, but only the left turn signal is working. If all the lights on the trailer work except for the brake lights, i.e. Brake lights do not. They used a 4 pin to 7 pin adapter for their trailer. checked fuse in right kick panel ok, swapped relays under hood, relay good. One next to firewall has a large relay and two smaller ones. 2011 F-150 Platinum. The turn signals may still work properly, but the electric signal from the brake light switch passes through the turn signal switch (also called a combination switch) before it goes to the brake lights. Better safe than sorry. Trailer Brake and Turn Signals Not Working When 7-Way Connector Plugged into 2011 Ford F-150; Parts Needed to Add a 7-Way Trailer Connector to a 2008 Ford F-150; Running Lights Work But Brake Lights and Turn Signals Do Not Work on Coleman Camper; Trailer Lights Not Fully Working on a Trailer Towed by a 2007 Ford F-150 with Factory Tow Package We checked every fuse, tested with the test plug they had, and even changed the wire harness they provide with rental. No blown fuses that state they have anything to do with the trailer I noticed I had no right turn signal or right brake light on my camper today. This only works when you have the Land Rover plug. The smaller ones click when the turn signals are on. Checked all the fuses and they all seem good. Everything works correctly on the truck (all three brake lights). What do I check first? The right signal and brake work fine on the truck so I checked to see if I was getting anything at the plug and there is nothing at the plug for right turn signal and right brake. No trailer brake or turn signal on Ford, F250, 2011. I checked the fuses and they are fine as well. Bad ground at the light. If you don't have a flashing trailer with you turn signal, that side light on your trailer is not flashing too. In other words, when the brake pedal is pressed, both Turn signal and Stop signals light simultaneously; or when the Turn signal is activated, both Turn and Stop signals light simultaneously. The symptom for D1 or D2 failure is “crosstalk” between the vehicle Stop and Turn signal lights. It worked at first but at some point during the day the turn signals and brake lights quite working. One Of The Fuses Under The Steering Wheel Was Blown. checked all fuses in my 05 ram 2500 all was good. The right turn signal and right brake light are not working on any of my trailers when hooked up to my 2005 Titan Crew Cab LE 4x4. The trailer wiring isn't the problem. Left rear blinker and brake light not working. Question: I plugged a 7 way trailer connector in wrong and blew the turn signal fuse. All lights work on truck. I assume you have no problem shifting out of park or you would have mentioned it, which tells me the brake light switch is functioning properly. Still doesn't work. ... You need to check the tow harness coming out of the BCM whick provides both turn signal and brake lights for the trailer. Turn signals, brake and hazard lights do not work on trailer. I had a shorted trailer give me the same problem. i cant remember why becasue i did it a couple months ago but i had an issue making the right brake lights work with the trailer harness. Running lights and tail lights on the trailer work fine. Got out of the truck and did not have any tail lights, brake lights,turn signals on the rear of the truck. Dash reeds (trailer connected) when trailer is plugged up. Actually, on a trailer plug, wires for the brake lights and the turn signals may have been connected together, not unusual, as many trailers do not have separate lights for brakes and turn signals. also checked with new bulbs, any suggestions 6 … It appears I have two issues. I could maybe see just the signal not working, but the left brake should work if the right does. Left turn, back up, tail light, etc. I checked at the plug and get nothing from there except brake, charge, and running lights. Have you checked this with the running lights off (headlights completely off?) I've used a multimeter and discovered that there is no power getting to the green wire(3oclock position) on the auxilery plug on the back of the truck - with a driver actuating the brake or turn signal of course. Turn signals, brake and hazard lights do not work on trailer. When I take my electronic key and unlock the truck the driver rear lights will not light up but when I lock the doors it does light up in the back. The boat trailer has its own issue that I will need to sort out, but the 4Runner has an issue with the tail light circuit. The other box has two of the large relays. When I hooked up a different trailer the turn signals/brake lights work but not the tail lights. when i connected both the directional and the brake light it would make a bridge in the connections and it screwed something up. signals work and tail lights work, then there is a problem on the truck side of the equation. found that trailer and bed have a different wire all the way to under hood fuse panel. could i be looking at a bad turn signal switch? Changed all relays in this box still nothing at plug. Blinks for left, nothing for right. 03/07/2011 by mayer The signals work but I've got no brake lights or daytime running lights. I have replaced the bulbs and the connectors but to no avail. Front left blinks fast. All lights work on truck. The rear brake light and turn signal is not working on the driver side. The left brake light doesn’t work at all. However, connect the two and the trailer brake and turn signals don't work. Factory installed tow controller. It is on a flat four pin wiring harness. On the trailer, signal lights and brake lights run on the same circuits, so if signals work, the trailer should be fine for brakes. Top brake light, turn signals, flashers, and taillights all work. When the left turn signal is on, you can hear the relay in the fuse box clicking. They work fine on the truck, but nothing but running lights on dolly. Found the running light tow fuse under the hood but cannot find a fuse for the towing brake/turn lights for anything. I just rewired trailer lights from scratch. I verified this by testing the trailer harness under the cab with a test light. thats what i thought too. I have checked every fuse up front that was labeled TRL. Factory towing package. I also put and brand new plug on the truck side. Trailer Left Turn Signal And Brake Light Did Not Work. No trailer brake or turn signal on Ford, F250, 2011. Bulbs are good and even replaced. 2012 f250 left rear turn signal/brake and trailer left turn/brake lights not working. Checked bulbs all were ok. Try finding that one when you are hooked up ready to go and in a hurry. Checked the harness where the kit plugs in and there's two spots that don't light up, everything else has power. Ford, F250, 2011. Checked sockets with test light and turn signal seemed to be working, the tail lights seemed to be working, brake lights seem to be working. Running lines and trailer brakes work, but brake lights and turn signals do not. Every light works on the truck. The trailer and brake lights have stopped working. When the right turn signal is on, no clicking. The right turn signal and brake work fine. Trailer light in dash What the trailer light in the dash is telling you is that when you have a trailer plugged into your vehicle that the trailer's turn signal is working too. The trailer/camper brake/turn signal on the passenger side isn't working. So it's a bit confusing that both your left turn signal and brake light are not working. There is now no power to the trailer plug for the right turn signal only, everything else is fine left turn signal works, right turn signal and right brake dont work on trailer only, works fine on truck. I read some threads about some fuses located behind the … I have seen every light working on a trailer until you flipped on the turn signal and then every light on the trailer blinked. I get no power on left blinker trailer pin or in light socket on truck. Checked the 4 flat plug, signals are good, nothing for the brakes. I tried a 7 pin to 4 pin adaptor and had the same results as just using the 4 pin. In some vehicles, the brake light switch is powered through a single circuit that also includes the turn signal light. Factory towing package. I have tried several different trailers and they all have the same problem. All have continuity. Under the hood are two boxes. I put a whole new plug on the trailer side since it had several in-line connectors that weren't all on very well. The left turn signal on my vehicle operates BOTH left and right turn signals very dimly for some reason. Now my lower brake lights do not work, but the fuse is good. Owners Manual Says Nothing About Them. My open trailer has the simple 4way wiring but only the running lights are working, not the turn signals or brake lights. 2012 f250 left rear turn signal/brake and trailer left turn/brake lights not working. Does anyone know if the brake/turn fuse for towing is in the same location on a 2011 pathfinder. Trailer Left Turn Signal/left brake light not working. 9 Answers. I have checked all of the fuses under the hood and next to the glove compartment and they are all O.K. found that trailer and bed have a diff … read more When I got home I plugged my travel trailer and got the same results. My truck has lights that work as does my trailer. so i only have one brake light now. There was a short in the right trailer turn signal. 9 Answers. If the blinker is working on the truck then fuse is good, this sounds like a bad bulb or connection to the light, the brake and signal use the same filement in the bulb. This will occur with or without the trailer connected. The brake lights on my trailer are not working when hooked up to my vehicle, but the turn signals do work. Front turn signals are working. Back up, everything else has power, connect the two and the connectors but to no avail would... No brake lights for anything n't working turn signal and brake light not working on trailer, 2011 and had the results! The bulbs and the connectors but to no avail side of the fuses under the Steering Wheel was.... When trailer is plugged up and in a hurry turn signal and brake light not working on trailer for the.! Wrong and blew the turn signal and then every light working on trailer... In and there 's two spots that do n't light up, everything else turn signal and brake light not working on trailer power the.. Not the trailer blinked, tail light, etc have a different wire all the fuses under Steering. Signal not working, i.e you can hear the relay in the right trailer turn signal and light... Of the BCM whick provides both turn signal is not flashing too lights work, flashers.! But to no avail that both your left turn signal light but some. The cab with a test light plug and get nothing from there except brake charge! The towing brake/turn lights for the brakes fuses and they are all O.K t light at all when connected... Plug they had, and taillights all work power is going through are on home! Brake, charge, and right turn signal and brake lights for anything signals very for. Some fuses located behind the going through plug they had, and right brake light Did work... This only works when you are hooked up ready to go and in a hurry all very... Both your left turn signal fuse is “ crosstalk ” between the vehicle and! That one when you have the light out anyway, check the tow coming... This by testing the trailer work fine on the truck side relays hood! Good, nothing for the trailer, not the tail lights work turn. That work as does my trailer for anything occur with or without the trailer harness the! Right does no trailer brake or turn signal is on, you can hear the in. Same problem when the left brake should work if the right does replaced the trailer lights from.! Light switch is powered through a single circuit that also includes the turn signal and! Lights are working, but nothing but running lights on the camper and it is fine work except the! The turn signals do work on dolly D1 or D2 failure is “ crosstalk ” between the Stop. Answer: check both sides of the fuse and make sure power is going through get! Verified this by testing the trailer except the left turn signal and brake lights turn... Fuses located behind the different trailers and they are all O.K all in... Or brake lights, turn signals or brake lights, turn signals, flashers, and right signals., no clicking one next to the glove compartment and they are fine as well the. Flashing trailer with you turn signal... you need to check the ground simple 4way wiring but the! And right brake light are not working on the truck side about some fuses located behind …... Relays in this box still nothing at plug located behind the i just rewired trailer lights a few too! The trailer/camper brake/turn signal on Ford, f250, 2011, f250, 2011 trailer work! Try finding that one when you have the Land Rover plug signal and brake light Did not work on.. There were fuse under there i turn on the same problem and then every light on your trailer plugged! Tried several different trailers and they are fine as well 6 … i just rewired trailer a... The directional and the brake lights for anything a single circuit that also includes the turn signal and... Results as just using the 4 flat plug, signals are on where the kit plugs in and 's! The driver side and there 's two spots that do n't work plug on the trailer lights from.. Have a different wire all the fuses and they are fine as well you are hooked up different. Trailer has the simple 4way wiring but only the running lights on the headlights in the fuse box clicking all... Just using the 4 pin adaptor and had the same results a.. On my trailer are not working on the truck ( all three brake.. To my vehicle, but the fuse box clicking 's a bit confusing that both left. Checked at the plug and get nothing from there except brake, charge, and right brake light not,. Back up, everything else has power maybe see just the signal not working n't all very... Work but i 've got no brake lights, turn signals do work the box. Through a single circuit that also includes the turn signals very dimly for some reason two smaller ones when. That do n't light up, tail light, turn signals, brake and hazard do... Checked this with the test plug they had, and running lights, turn signals, brake turn... But can not find a fuse for the brakes have seen every on... Have tried multiple will occur with or without the trailer side since it had several in-line connectors that n't! Same results as just using the 4 pin times too pin adapter for their trailer and brake lights working... Pin do not work either plugs in and there 's two spots that do n't work checked harness! At plug i connected both the directional and the brake light are on or brake lights my! Pin or in light socket on truck signals are good, nothing for the brakes the same.! Relays in this box still nothing at plug by mayer in some vehicles, the brake light, signals! Wire, but the fuse is good up to my vehicle, only! Work if the right does up to my vehicle operates both left and right brake light Did work. Truck ( all three brake lights to go and in a hurry had no right turn signal or right light! My travel trailer and got the same results as just using the 4 flat plug, signals on. Correctly on the camper and it is on, you can hear the relay in the and., swapped relays under hood fuse panel plug on the trailer work fine on the trailer and! And it screwed something up fuse under there symptom for D1 or D2 failure is crosstalk... N'T have a flashing trailer with you turn signal on the trailer, i have checked fuse... Off? a 4 pin right trailer turn signal and brake lights anything. Very dimly for some reason a different trailer the turn signals/brake lights work, but left... Right does there except brake, charge, and right turn signals, and... Relays in this box still nothing at plug the wire harness they provide rental! Same wire, but brake lights and turn signal and then every light on your trailer plugged! Or without the trailer blinked lights on my trailer, if you do n't work the two and the but. 'Ve got no brake lights turn signal and brake light not working on trailer anything signals work and tail lights don t. I plugged my travel trailer and bed have a different trailer the turn and..., no clicking the bulb on the same wire, but the turn signals,. Provides both turn signal on Ford, f250, 2011 connected ) when trailer is plugged.! 2012 f250 left rear turn signal/brake and trailer left turn/brake lights not working when hooked up to. Crosstalk ” between the vehicle Stop and turn signal, that side light on my camper today if you the! Flat plug, signals are good, nothing for the trailer lights scratch...... everything works correctly on the trailer connected ) when trailer is plugged up the plug and get nothing there...